Fjordia lineata (Loven, 1846)

20 March , 2011.
Lochside Cottages, Loch Leven on the west coast. 
12 mm juvenile animal, one of two on hydroid at 12 m. Water temperature 6.5°C.
Sony NEX-5 in Nauticam housing, 18-55mm lens, SubSee +10 dioptre and 2 x Inon D-2000 flashes.

for more information about this species go to one of the links below
OPK - Opistobranquis nudibranchs of the british isles sea slug forum